Form for making latex articles



May 31, 1938. A. N; SPANEL FORM FOR MAKING LATEX ARTICLES Original Filed Feb. 2'7, 1936 5 Sheets-Sheet l awe/ Z .1 A RNEYS May 31, 1938. A. N. SPANEL 2,119,499

FORM FOR MAKING LATEX ARTICLES Original Filed Feb. 27, 1936 3 Sheets-Sheet 2 man n 1111 bm/mmgmd. BY A) A RNEYS.

May 31, 1 938.

A. N; sPANEL.

FORM FOR MAKING LATEX ARTICLES Original Filed Feb. 2'7, 1936 3 Sheets-Sheet 3 1 Ill/ll Ill/Ill 7 a I N V EN TOR. Abra/1am 1 Juan? By 19 A gums.

Patented May 31, 1938 UNITED STATES PATENT OFFICE Original application February 27, 1936, Serial No. 66,045. Divided and this application October 12, 1937, Serial No. 168,633

5 Claims.

This invention relates to forms for making latex articles.

This application is a division of applicants copending application, Serial No. 66,045, filed 5 Feb. 27, 1936. i

In the manufacturing of deposited latex or rubber articles, it is essential that the margins thereof be reinforced without having the reinforcement bulky or unsightly.

A main feature of the present invention relates to the provision of a form having novel double reinforcement-generating means for the margin of the article.

Another feature of the invention relates to the provision of a reinforcement-generating groove adjacent an abrupt edge of a form on which latex or rubber articles are made whereby an extremely thin or membranous layer of rubber will be deposited at the abrupt edge of the form and thereby facilitate removal of the excess or waste rubber from the article deposited on the form.

Another featureof the invention relates to a form for making a hollow rubber article in which 25 the curved side edges of the article are reinforced by integral ridges of latex.

Still another feature of the invention relates to the provision of a form on which a novel type of margin for the Waist opening and the like in a latex garment can be deposited.

A further feature of the invention relates to novel forms on which the reinforced margins and the reinforced curved edges of latex or rubber articles can be deposited.

An additional feature of the invention relates to novel forms on which a hollow latex article having openings therein defined by reinforced margins with reentrant or concave outlines extending into the body of the article thereby giving the wearer maximum protection with a minimum amount of latex material can be deposited.

The other features and advantages of the invention will appear from the detailed description and claims when taken with the drawings in which- Fig. 1 is a front view and Fig. 2 is an edge View of a form on which rubber or latex pants can be deposited; 50 Fig. 3 is an enlarged cross sectional view taken on the line 33 of Fig. 2 also showing a layer of latex on the form as deposited during the making of the pants;

Fig. 4 is an enlarged cross sectional view taken substantially on the line 4-4 of Fig. 2

also showing thereon a layer of latex in the position in which it is deposited on the form;

Fig. 5 is an enlarged fragmentary cross sectional view taken substantially on the line 5-5 of Fig. I particularly illustrating the offset relation of certain of the edges of the forms at the waist opening, which form has a layer of deposited latex thereon;

Fig. 6 is an enlarged fragmentary cross sectional view taken substantially on the line 66 of Fig. 1 with a layer of latex thereon illustrating how the reinforcement of the leg opening and the reinforcement for the ventilating opening is developed in the deposited layer;

Fig. 7 is a front View, and

Fig. 8 is an edge view of a form on which a different type of pants can be deposited;

Fig. 9 is an enlarged sectional View taken on the line 99 of Fig. 8 with a layer of latex thereon to illustrate how the material at each margin of the leg opening and at the curved edge of the pants are reinforced;

Fig. 10 is an enlarged cross sectional view taken on the line III-40 of Fig. 7 with a layer oflatex thereon disclosing how the reinforcement for the margin of the pants at the ventilating opening and the margin of the pants at the waist opening therein, is developed;

Fig. 11 illustrates a front elevation of a form with a bathing cap deposited thereon, a portion of said cap being broken away to disclose the form, showing how the present invention can be applied to the manufacture of bathing caps;

Fig. 12 is a section through the cap only, taken on the line [2-12 of Fig. 11;

Fig. 13 is a front view of a latex glove made in accordance with the present invention;

Fig. 14 is an enlarged cross sectional view of said glove taken substantially on the line I4l4 Of Fig. 13; V 40 Fig. 15 is a fragmentary View of the cuff portion of a modified type of glove;

Fig. 16, is an enlarged cross sectional view thereof taken on the line l6l6 of Fig. 15 illustrating the character of reinforcement for the margin and for the edge of the cuff at the opening in the glove;

Fig; 1'7 is a front elevation and Fig. 18 is an edge elevation of a form on which the glove of Figs. 13 and 14 can be deposited;

Fig. 19 is an enlarged cross sectional view of this form taken on the line I 9l9 of Fig. 17; Fig. 20 is a fragmentary front view of a form ,on which the glove of Figs. 15 and 16 can be deposited; and

Fig. 21 is an enlarged cross sectional view 7 thereof taken on the line 21-2! of Fig. 20.

In Figs. 1 to 6 there is illustrated a form on .which pants may be made by depositing an aqueous dispersion of rubber thereon. This'form,

which has the general outline of the pants to.

be deposited thereon, is provided with raised bosses 36 defined by a groove 31 at the junction between the boss and the body of the form. Each boss preferably terminates in an abrupt edge 38 to define a leg opening in the deposited garment. On each side edge of the formthere is provided a boss 39. of generally elliptical outline ,which boss terminates in an abruptedge to define a ventilating opening in the deposited garment. The lower part of 'the-form,-whichgenerates the waist opening in the deposited pants, terminates in an abrupt edge, the rear portion 4la of this edge extending beyond the front por- 7 tion 41b thereof. 7 It willbe noted that the portion Ma of this -edge extends not only in the rear of the form but also around the side edges thereof asindicated at Mo. V I e It, has been discovered thatrwhen latex is deposited on a curved surface of relatively small radius, the deposited latex layer tends to be thinner than a'c'orre'sponding layer deposited'on a fiat surface, of theform. .For this reason it has been necessary in thepastto make the forms relatively thick so, that there would notbe an objectionabledifierence in thickness between the portion of. the, garment on the curved edge of the form andthat on, theflat surface thereof,

Obviously; a givenfnumbenof suchthick forms displace a correspondingly largerfamount of'the latex bath than equal number of thin forms thereby requiring a larger quantity of ;the latex 'and'a-larger receptacle to hold it. Also 'such thick formsare awkward to handle because of 'their greate'rjbulk: 'Inaccordance withthe present invention it is proposed to provide sets of grooves 42 on the curved edge of the form adjacent each of the bosses 36 so that reinforcing ridges 22 aregdeposited. in; the latex ilayer,

as indicated in Fig. 3, to reinforce the side edge.

of the garment where there is a tendency'for weakness to, develop *therein -fsimilarly, the curved edge .of, the form adjacent the portion thereof which develops the waist opening, is provided with sets of grooves in whieh therein forcing ribs 2| can be deposited. V r

In making a pair of pants on this form, latex is deposited thereonwhile the formissupported vertically with its edge Ma, 41b and'glc in the lowermost position. .While the'l'atexmay be deposited onthe form in; various ways it ispreferred' to dip the same into a 'bath' of an aqueous.

dispersion of rubber. The form may be preferably dipped several times with a dryin or setting interval .betweeneach dip. When a layer of latex of the desired thicknessjhas been de- 7 posited on the form, this layer is permitted to set. It will be appreciated' that' during ,the dipping joperations; the*latex will accumulate in the groove 31 adjacent the boss 36, w hile at the abrupt edge '38 of this boss, a line of weakness will develop' inthislayer; Similarly, the

7 latex will accumulateflinthe' grooves Hand 43.

'Also at the junction between the b035 3?! and the akne A the abrupt edge of the formythe latex will ac- 75 body ,o fthe: form; the latexwill accumulate as indicated at [8 'inFiglfi, while at theabrupt edge- 4 0 of the boss the 1 yer will develop ajlineof Above the portions lla-arid ll-bot cumulate as a ridge l1 (Fig. 5). lt s h ould be noted that at the portion 4|c of the abrupt edge, the latex layer will have a thickness approximately' equal to that of the body of the pants or less, as indicated at 23 in the lower part of Fig. 4.

If the spacing between the lowermost groove 43 and the portion Mc of the abrupt edge is relatively narrow, then the margin below groove 43 will ,be' equal to or less in thickness than the main layer of the garment. However, if the above mentioned spacing is relatively wide, a re-i inforcing ridge similar to 11 will be developed.

leaving. a thin edge. Similarly, on the faces of g the bosses 39, the excess portion of the layer is 'torn away as far as the abrupt edges ML Likewise, on the lower end of theiorm thesexcess 'portion of the layer. is torn away as far as the abrupt edge having the portions Ma, Mb and Me. After the pants are vulcanized they are removed fromthe form and prepared for sale in V I the usual manner.

In Figs. 7 to. 10; the're i s illustrated a form on which a modified type of pantsmay be made by depositing an aqueous dispersion of rubber there- I on. The parts of this form, which are identical 'with that just described are designated by 1 the samereference characters. This form dif' fers from that already described in that the bosses 36a which define the'leg openings, are generally ellipticaland project from the body of the form to an abrupt edge 38a. 'The ventilating bosses on theside edge of the form have been omitted and in'steadroun'ded or oval shaped bosses 45 are provided on the front surface'of the form. Each ofth'ese bosses which project Also instead of providing. the short grooves 43 adjacent the abruptlower edge of the form, there from the form, terminates in 'an abrupt edge. J

circlethe f ormlin substantially parallel relation 1 to the abrupt lower edge thereof having the portions Ma, Mb and Me. The curved; edge of V the form between bosses which define the leg openings, isprovided with a series of transverse grooves 48 which are preferably uniformly spaced 1 from .each other. Likewise each edge of the form between the legdefining bosses and the abrupt lower edge are similarly provided with transverse grooves-43 which are also preferably spaced an equal distance from each other.

The method of making a garment on this form is similar. to that already described and need not be repeated except to state that the latex accumulates asridges 3| and 26in the grooves 46, 41 andv 48. It should be noted that at the portion 411), the latex layer 'will hav'e a thickness approximatelyflequal tothat of the body portion ofthe pants orless as indicated .in Fig.

body of forrn (Fig; 9) the latex'will accumulateas a'generally triangular reinforcement 29 '10. J'At the, junction of the boss 36a with the the layer has suitably dried or set on the form the excess portions of the layer (not shown) on the faces of the bosses 36a and 45 as well as on the lower end of the form are stripped away as previously set forth.

This invention is also applicable to the making of latex bathing caps, such a cap 50 being illustrated in Fig. 11 where it is shown in the position in which it is deposited on the form 5!. This cap is provided with a reinforcing rib 52 adjacent its edge 53 at the opening therein. It should be noted that a portion of the cap below the rib 52 tapers to edge 53.

This cap is also made by depositing a layer of an aqueous dispersion of rubber on the form 5! which has the general outline of the desired cap. This form terminates in an abrupt edge 55 at the bottom of the form which develops a line of weakness in the deposited latex layer on the form so that the excess portion of layer can be stripped or torn away at this end. Adjacent this abrupt edge there is provided a groove 55 encircling the form.

The present invention is also applicable to the making of latex gloves such as 60 illustrated in Figs. 13 and 14. This glove is provided with a reinforcing rib 6| encircling the margin of the cuff.

This glove can preferably be made by depositing the latex on a form 63 illustrated in Figs. 17, 18 and 19. This form which has the general shape of a hand, terminates at its lower end in an abrupt edge 54. Adjacent this abrupt edge there is provided a groove 65 cut into and encircling the form.

The glove is made by depositing latex on the form while it is supported in a vertical position with its abrupt edge in the lower position. In the course of depositing the latex on this form, a layer of latex develops uniformly over the surface of the form but accumulates in the groove 65 as a reinforcing rib 6|. However, a line of weakness develops in the layer at the abrupt edge 64 of the form. When the layer has set, the excess portion thereof on the lower end of the form is stripped away as far as this line. The glove, when vulcanized, may be removed from the form.

In Figs. 15 and 16, there is illustrated a fragment of a modified type of glove 10 in which the margin of the cuff is reinforced, not only by a rib H, but also by a ridge 12 which terminates at a torn or thin edge 14. This ridge together with the rib H provides a double reinforcement which serves to increase the strength of the glove at the opening therein.

This modified type of glove can be made on a form similar to that illustrated in Figs. 17, 18 and 19 when modified as indicated in Figs. 20 and 21. In this instance a groove 13 in the lower portion of the form is spaced a distance sufficient from the abrupt edge 74 of the form so that the reinforcement 12 can be developed.

The forms 35 illustrated in Figs. 1 and '7 are provided with supports 5 whereby the forms may be suspended from a suitable dipping rack (not shown), with the abrupt edge defining the waist opening lowermost. The form 50 may also be supported with its abrupt edge 55 lowermost, by means of the depending fin or support S secured to the bottom surface of the form. The glove forms 63 are provided with recesses C which receive upwardly extending bosses or supports of a dipping rack (not shown).

The present disclosure is given merely by way of example and it will be understood that there can be many modifications and variations therein within the scope of the appended claims without departing from the spirit of the present invention.

What I claim is: A

1. A form for making seamless, deposited rubber pants, said form comprising a relatively .thin member having the general outline of the pants to be deposited thereon, leg-opening defining portions and a waist-opening defining portion provided on said member, the edges of said member between the leg-opening defining portions and between said last mentioned portions and the waist-opening defining portions being rounded, certain of said rounded edges having a plurality of spaced reinforcement-generating grooves formed therein, each groove extending substantially across an edge only.

2. A form for making seamless, deposited rubber pants, said form comprising a relatively thin member having the general outline of the pants to be deposited thereon, leg-opening defining portions and a waist-opening defining portion pr vided on said member, the edge of said member between the leg-opening defining portions being rounded, said rounded edge having a plurality of spaced reinforcement-generating grooves formed therein, each groove extending substantially across an edge only.

3. A form for making seamless, deposited rubber pants, said form comprising a relatively thin member having the general outline of the pants to be deposited thereon, leg-opening defining portions and a waist-opening defining portion provided on said member, the edges of said member between the leg-opening defining portions and the waist-opening defining portion being rounded, said rounded edges having a plurality of spaced reinforcement-generating grooves formed therein, each groove extending substantially across an edge only.

4. A form for making a deposited rubber article having the general shape of said article, said form being provided with an abrupt edge at a portion thereof where an edge is desired on said article, said form having a reinforcement-generating groove therein spaced from but adjacent to said abrupt edge, the surface of said groove merging gradually with the surface of said form at each side of said groove, the portion of said surface of the form at one side of said groove extending in the same general direction as the surface of the form at the other side of said groove.

5. A form for making a deposited rubber article having the general shape of said article, said form being provided with an abrupt edge at a portion thereof where an edge is desired on said article, said form having a reinforcement-generating groove therein spaced from but immediately adjacent to said abrupt edge, the surface of said groove merging gradually with the surface of said form at each side of said groove, the portion of said surface of the form at one side of said groove extending in the same general direction as the surface of the form at the other side of said groove, and means for supporting said form with the abrupt edge lowermost.

ABRAHAM N. sPANEL. 

